customoffice.dk

📜 Historical scan 2026-08-21 17:42:54 · ← Latest scan

⬇ Zone File 📜 Timeline & History ⚡ Scan Now

customoffice.dk is a .dk domain served by 2 nameservers (alan.ns.cloudflare.com, grace.ns.cloudflare.com). It was registered on 5 May 2011 (WHOIS) and was already in the .dk zone when our tracking began on 16 June 2026. Its website address 104.21.6.43 is hosted by Cloudflare, Inc. (AS13335). Mail is handled by aspmx.l.google.com, alt1.aspmx.l.google.com and 3 more. The zone is not DNSSEC-signed, publishes a DMARC policy and is reachable over IPv6. Below are all of its DNS records from this scan: nameservers, A/AAAA, MX, TXT, SPF, DMARC, CAA, TLSA/DANE, MTA-STS, SRV and more.

🖥️ Nameservers#

2 records 258ms

Nameserver	IP addresses	PTR	ASN / ISP
alan.ns.cloudflare.com	108.162.193.57 172.64.33.57 173.245.59.57 2606:4700:58::adf5:3b39 2803:f800:50::6ca2:c139 2a06:98c1:50::ac40:2139	alan.ns.cloudflare.com alan.ns.cloudflare.com alan.ns.cloudflare.com alan.ns.cloudflare.com alan.ns.cloudflare.com alan.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.
grace.ns.cloudflare.com	108.162.192.159 172.64.32.159 173.245.58.159 2606:4700:50::adf5:3a9f 2803:f800:50::6ca2:c09f 2a06:98c1:50::ac40:209f	grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com grace.ns.cloudflare.com	AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc. AS13335 Cloudflare, Inc.

🌍 A Records#

2 records 272ms

IP	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
104.21.6.43	300s	—	AS13335	Cloudflare, Inc.	104.21.0.0/17	—	—
172.67.154.231	300s	—	AS13335	Cloudflare, Inc.	172.67.128.0/17	—	—

📧 MX Records#

5 records 279ms

Priority	TTL	Mail Server	IP addresses	PTR	ASN
10	300s	aspmx.l.google.com	142.251.168.26 2a00:1450:400c:c04::1b 2a00:1450:400c:c04::1b	wh-in-f26.1e100.net wk-in-f27.1e100.net wk-in-x1b.1e100.net	AS15169 Google LLC AS15169 Google LLC AS15169 Google LLC
20	300s	alt1.aspmx.l.google.com	192.178.213.26 2a00:1450:4025:c01::1a	yugrqzs-in-f26.1e100.net rd-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
20	300s	alt2.aspmx.l.google.com	142.251.127.27 2a00:1450:4010:c22::1a	lcfrai-in-f27.1e100.net yulpptr-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	300s	aspmx2.googlemail.com	192.178.213.26 2a00:1450:4013:c1e::1a	yugrqzs-in-f26.1e100.net yugrqzs-in-f26.1e100.net	AS15169 Google LLC AS15169 Google LLC
30	300s	aspmx3.googlemail.com	142.251.127.27 2a00:1450:4010:c22::1b	lcfrai-in-f27.1e100.net yulpptr-in-f27.1e100.net	AS15169 Google LLC AS15169 Google LLC

🔷 AAAA Records (IPv6)#

2 records 267ms

IPv6 Address	TTL	PTR	ASN	ISP / Org	CIDR	Country	City
2606:4700:3032::ac43:9ae7	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—
2606:4700:3034::6815:62b	300s	—	AS13335	Cloudflare, Inc.	2606:4700:3000:0:0:0:0:0/42	—	—

🔐 HTTPS Records#

1 records 268ms

Priority	Target	SvcParams
1 service	.	alpn="h2" ipv4hint=104.21.6.43,172.67.154.231 ech=AEX+DQBBLQAgACCVijVnrdTiGn5EZuGMPclZj6RX3RXcaLkcIxSe2++TQgAEAAEAAQASY2xvdWRmbGFyZS1lY2guY29tAAA= ipv6hint=2606:4700:3032::ac43:9ae7,2606:4700:3034::6815:62b

📝 TXT Records#

3 records 729ms

TXT Record
anthropic-domain-verification-992zwc=5DwOIzes67TW8WqSXY5u37qen
google-site-verification=aXGpqjI8Vdr2ShtlY5hYlCEyx6iVBLY0DE4ZZEv4Hqg
v=spf1 include:sendgrid.net include:servers.mcsv.net include:_spf.google.com include:email.freshdesk.com include:spf.simply.com include:146721256.spf08.hubspotemail.net -all

✉️ SPF#

Policy	Record (customoffice.dk)
-all (hard fail)	v=spf1 include:sendgrid.net include:servers.mcsv.net include:_spf.google.com include:email.freshdesk.com include:spf.simply.com include:146721256.spf08.hubspotemail.net -all

📨 DMARC#

Policy	Record (_dmarc.customoffice.dk)
p=none (monitor only)	v=DMARC1; p=none; rua=mailto:developer@customoffice.dk; pct=100; adkim=r; aspf=r

📬 MTA-STS#

✗ No MTA-STS policy — SMTP TLS not enforced

📈 TLSRPT#

✗ No TLSRPT record — no SMTP TLS failure reporting

📜 CAA Records#

✗ No CAA records — any CA may issue certificates

🧩 Web & zone#

latest probe, not this scan · checked 2026-10-17 14:26:18

www	104.21.6.43 172.67.154.231 2606:4700:3032::ac43:9ae7 2606:4700:3034::6815:62b (AS13335) (address records, no CNAME)
www vs bare domain	Same network customoffice.dk: 104.21.6.43 172.67.154.231 2606:4700:3032::ac43:9ae7 2606:4700:3034::6815:62b (AS13335) www.customoffice.dk: 104.21.6.43 172.67.154.231 2606:4700:3032::ac43:9ae7 2606:4700:3034::6815:62b (AS13335)
Wildcard	No

✍️ DKIM keys#

3 found

Selector	CNAME	Key
google	—	RSA · ~2048 bit
s1	s1.domainkey.u23374310.wl061.sendgrid.net	RSA · ~2048 bit
s2	s2.domainkey.u23374310.wl061.sendgrid.net	RSA · ~2048 bit

DKIM selectors can't be listed, so we check the common ones (Microsoft 365, Google, Mailchimp, SendGrid, generic). Keys under other selectors aren't shown.

🔎 SPF check#

zone-wide SPF report

DNS lookups: 13/10 · policy: -all

error 13 DNS lookups: the limit is 10, so a receiver whose evaluation gets past the 10th returns permerror (SPF fails)

🔗 TLSA / DANE#

✗ No TLSA records — DANE not configured for HTTPS (_443) or MX (_25)

🔐 DNSSEC#

511ms

Check	Result
Validation Status	🔓 Insecure
AD Flag (resolver validates)	✗ Not set
DS Record	✗ Not found
DNSKEY Record	✗ Not found
Flags	unsigned answer

🏷️ SOA#

0ms

Field	Value
Serial	2412761385
Primary NS (MNAME)	alan.ns.cloudflare.com
Responsible (RNAME)	dns@cloudflare.com
Refresh	10000s
Retry	2400s
Expire	604800s
Minimum (neg-cache TTL)	1800s

📋 Registration#

WHOIS fetched 2026-10-17 14:54:30

Field	Value
Registrar	Simply.com A/S
Registered	2011-05-05
Expires	2027-05-31 (225d)

🔗 Same registrant#

0 domains

Other .dk domains whose WHOIS registrant has the same name and postal address. Matched on a keyed hash: the registrant's details are not stored or shown. Covers only domains whose WHOIS we have fetched (refreshed about monthly).

No other domain with this registrant in our WHOIS data yet

📋 WHOIS#

⏱️ Lookup Timing#

258ms

272ms

279ms

AAAA

267ms

TXT

729ms

CAA

269ms

HTTPS

268ms

TLSA

494ms

SOA

0ms

MTA-STS

382ms

DNSSEC

511ms

SRV

320ms

Total

9484ms

🕐 Scan History#

Scanned At	Duration	Records	DNSSEC
2026-10-17 14:26:18	2671ms	2 NS 2 A 5 MX	🔓 Insecure
2026-10-13 08:08:36	6336ms	2 NS 2 A 5 MX	🔓 Insecure
2026-10-05 20:09:10	5230ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-30 19:31:00	908ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-27 18:14:58	9618ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-23 13:47:01	1596ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-18 19:23:23	890ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-05 06:17:36	1288ms	2 NS 2 A 5 MX	🔓 Insecure
2026-09-03 19:43:24	1615ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-30 23:19:21	745ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-27 11:43:40	887ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-24 20:14:15	9034ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-21 17:42:54 shown	9484ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-20 17:37:40	13630ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-19 14:52:29	2496ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-08 09:09:09	17511ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-07 01:26:57	1527ms	2 NS 2 A 5 MX	🔓 Insecure
2026-08-02 02:25:26	9407ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-31 02:44:52	1473ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-25 07:50:30	2054ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-24 07:43:33	3243ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-18 04:46:14	7170ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-11 13:12:57	9291ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-09 02:17:10	10160ms	2 NS 2 A 5 MX	🔓 Insecure
2026-07-07 01:08:32	3078ms	2 NS 2 A 5 MX	🔓 Insecure